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System
Survey information

Hyper Dolphin

Deep Tow system

In the first year of the DONET project, the location of the observatory has been tentatively determined. Then the deep-sea survey and other fundamental examinations related to deployed sensors have been conducted by using JAMSTEC's research vessels and deep-sea vehicles. Natural events such as slumps, slides and turbidity currents on steep, sediment covered slopes, and earthquake events are potentially risks to the DONET in the deep-sea area in the lifetime. Both deep-sea survey and risk assessment are required in order to find better observatory's sites and safer submarine cable route. Sensors' installation tests have been also done since 2007. Their results could contribute to the actual sensors' development. We continue to carry out our surveys before deployment of DONET. Period Cruise No. Vessels Vehicles Operation Cruise summary Download in PDF

Finished Survey

Period Cruise No. Vessels Vehicles Operation Cruise summary
Dec,2006 KY06-13 Kaiyo Deep Tow system Route survey  
Apr,2007 KY07-06 Kaiyo Deep Tow system Bathymetry survey
Route survey
 
Jul,2007 YK07-E02 Yokosuka Deep Tow system Route clearance  
Aug,2007 KY07-11 Kaiyo Deep Tow system Bathymetry survey
Route survey
 
Nov,2007 KR07-15 Kairei Kaiko 7000II Benchmark installation  
Dec,2007 NT07-20 Natsushima Hyper Dolphin Seismic sensor test  
Feb,2008 NT08-04 Natsushima Hyper Dolphin Seismic sensor test  
Apr,2008 KY08-03 Kaiyo Deep Tow system Route survey
Route clearance
Benchmark installation
Download
Sep,2008 NT08-20 Natsushima Hyper Dolphin Seismic sensor test Download
Oct,2008 KR08-12 Kairei Kaiko 7000II Route survey Download
Nov,2008 NT08-23 Natsushima Hyper Dolphin Seismic sonsor test Download